it depends on what else you have in your system. http://www.pcpower.com/Power_Supply_Selector.html That should help give you an idea of what matters most, but it's still an estimate. If you have all kinds of USB devices, optical drives, hard drives, overclocked system, etc, it all factors into how much power you'll need.
Okay, so I went ahead and bought the card (a Gigabyte 896I to be specific.) The system booted fine and played games at high settings with a heavy GPU load fine. Now, however, whenever I boot the system it restarts 3 or 4 times right after the POST before I can into Windows 7. Once inside the OS everything is stable and the GPU performs well, but this is a really annoying issue. Anybody have any ideas?
Message edited by notzaar on 10-09-2009 at 01:57:34 PM